Scenario: Final calculated grade using Weighted system

You are teaching an introductory science course in which users are graded on four labs, their participation in discussion topics, and a final examination. You allow users to drop their lowest grade on a lab. You also provide bonus grades to users who act as moderators for discussion topics. If a user does not submit a lab, you leave it ungraded and treat ungraded items as a grade of 0.

You set up grade items and a Labs category with the following properties:

  Labs Lab 1 Lab 2 Lab 3 Lab 4 Discussions Moderator Exam

Category

Labs

Labs

Labs

Labs

Labs

None

None

None

Maximum points

n/a

10

10

10

10

10

5

100

Weight

50% (for entire Labs category)

 

 

 

 

 

 

 

 

 

25%

25%

25%

25%

 

 

 

Bonus

n/a

No

No

No

No

No

Yes

No

Drop lowest

1

 

 

 

 

 

 

 

 

You assign the following grades for the user Frank Catcher:

  Labs Lab 1 Lab 2 Lab 3 Lab 4 Discussions Moderator Exam

Frank Catcher

n/a

0

8

0

7

8

3

71

 

You release the calculated final grade to Frank. It is calculated as follows:

Grade item Calculation

Lab 1

= Dropped

Note: Dropped grade items are not included in calculations; grades are calculated as if the item does not exist.

Lab 2

= 8/10*25/(25+25+25)*100

= 26.67% towards the category

= 26.67*.5

= 13.33% towards the final grade

Note: Lab 1 is worth 33.33% of the Labs category even though it is assigned a weight of 25%. This is because the lowest lab grade is dropped and there are only three labs contributing to the category.

Lab 3

= 0/10*25/(25+25+25)*100

= 0% towards the category

= 0*.5

= 0% towards the final grade

See the note for Lab 1.

Lab 4

= 7/10*25/(25+25+25)*100

= 23.33% towards the category

= 23.33*.5

= 11.67% towards the final grade

See the note for Lab 1.

Discussions

= 8/10*10

= 8% towards the final grade

Moderator

= 3/5*5

= 3% on top of the final grade

Note: Bonus items are added to the final grade after other calculations. Do not include a bonus item’s weight in your total when balancing your grade book.

Exam

= 71/100*40

= 28.4% towards the final grade

Calculated Final Grade

= 13.33+11.67+8+3+28.4

= 64.4%